Rectifier system.



K. A. SMMOM RECHNER SYSTEM.

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l of Wheh the Ee-NGT s a Spe Any convenient source of' zxliemln'np;cufrents, auch, 'for emmpe, ne the mains 2 und 23 01S :L Hum-phase @auslseon sjfsem, is connected te' Sei', of tmns'mmeye L 5 :md ethei' inel'a er in saar Comueezen. The rans'foln'xexs: 4, und G :we respectivelyprovided with two Secondary windings 7, 8 and :we sturcomme-m and thei'neutral pemt 1s; emmectec is connected to mwtmexf currentsupply-cenduetor 2 of the eec're rawa-j) havingthe conductor 1Q. 19designates e vehce of the electric railway provde Wh twocurrent-@Heating Levi-:es 2) and 120" a three-phase transmission lineand elecvtrolyftie or 'mechanical rectifiers couldbe substituted for themercury-arc rectifiers 18-18 withoutA de arting from the spirit of myinvention. urthermore, any of the ordinary well known series-multiplesystems of motor control may be employed on the car in place of the simle rheostatic controlv illustrated, provide it is so designed as toalways maintain a symmetrical balance of the potential drop'. on eachside of the ground point 26. Under conditions of perfect balance, therewill be no current flow from the point 26 to the oint 17 but if, :forany reason, there shoul beal slight unbalancing, current will fiowbetween these two points, as in the neutral of an ordinary three-wiresystem.' Y

y While I have illustrated and described the mid-point of 'my system asgrounded if desired a third 'conductor may be provided andI shall usethe term neutral as coverwindin ing either a metallic conductor or anearth return.

Having thus described my invention,

what I claim is:

l. The combination with a three-wire, direct-current system ofdistribution, of a polyphase supply transformerprovided with primarywindings and with two. sets of secondary windings, tworectifying units,means for connecting one of said units in circuit with one of'said setsof secondary -windings between the neutral wire of said three Wiresystem andv one outside wire thereof, and means for similarly connectingthe remaining `unit and set of secondary between said neutral wire andthe remaining outside main.

polyphase supply transformer provided with primary windings and with twosets of secondary windings, two rectifying units, means for connectingone of said units in circuit. with one of said sets of secondarywindings between the neutral wire of said three wire system and oneoutside wire thereof, and means for similarly connecting the remainingunit and set of secondary windings between said neutral wire and theremaining outside main, the relative connections being such that aperiod of activity of each secondary winding of one set coincides with aperiod of inactivity of the cophasial secondary winding of the otherset.

\3. The combination with a three-wire, direct-current system ofdistribution, of a polyphas'e supply transformer provided with primarywindings and two distinct sets of secondary windings, said sets beingconnected in opposed Y, two rectifying units, means for connecting oneof said units in circuit with one of said sets of secondary windingsbetween the neutral Wire of said three-wire system and one outside wirethereoi, and means for similarly connecting the remaining unit and setof secondary windings between said neutral wire and the remainingoutside main.

In testimony whereof I have hereunto subscribed my name lthis 18th dayof April, 1914. s l

KARL A. SIMMON.

Witnesses:

